Fv also provides a portal into the new
Hera data analysis service
at the HEASARC:

Dozens of powerful utility program are available
to manipulate local FITS file

Do general image arithetic using complex mathematical expressions

Sort, merge, join, or filter rows of a table

Compute statistics about images or table columns

Make ASCII listings of the contents of any image or table

The programs run the same as if they were installed locally
but they actually execute on the Hera servers.

The input data files are transparently uploaded to the Hera servers where the
program is executed, and any output
FITS files and text output are transparently copied back to your machine after the
program finishes.

Hera tasks may be executed from the command line or using the special GUI built
into Fv.

For professional researchers, Hera provides
the complete suite of data analysis programs from the
FTOOLS, Chandra
CIAO,
and XMM
SAS
software packages.